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qemu/qapi/char.json
John Snow d461c27973 qapi: convert "Note" sections to plain rST 
We do not need a dedicated section for notes. By eliminating a specially
parsed section, these notes can be treated as normal rST paragraphs in
the new QMP reference manual, and can be placed and styled much more
flexibly.

Convert all existing "Note" and "Notes" sections to pure rST. As part of
the conversion, capitalize the first letter of each sentence and add
trailing punctuation where appropriate to ensure notes look sensible and
consistent in rendered HTML documentation. Markup is also re-aligned to
the de-facto standard of 3 spaces for directives.

Update docs/devel/qapi-code-gen.rst to reflect the new paradigm, and
update the QAPI parser to prohibit "Note" sections while suggesting a
new syntax. The exact formatting to use is a matter of taste, but a good
candidate is simply:

.. note:: lorem ipsum ...
   ... dolor sit amet ...
   ... consectetur adipiscing elit ...

... but there are other choices, too. The Sphinx readthedocs theme
offers theming for the following forms (capitalization unimportant); all
are adorned with a (!) symbol () in the title bar for rendered HTML
docs.

See
https://sphinx-rtd-theme.readthedocs.io/en/stable/demo/demo.html#admonitions
for examples of each directive/admonition in use.

These are rendered in orange:

.. Attention:: ...
.. Caution:: ...
.. WARNING:: ...

These are rendered in red:

.. DANGER:: ...
.. Error:: ...

These are rendered in green:

.. Hint:: ...
.. Important:: ...
.. Tip:: ...

These are rendered in blue:

.. Note:: ...
.. admonition:: custom title

   admonition body text

This patch uses ".. note::" almost everywhere, with just two "caution"
directives. Several instances of "Notes:" have been converted to
merely ".. note::", or multiple ".. note::" where appropriate.
".. admonition:: notes" is used in a few places where we had an
ordered list of multiple notes that would not make sense as
standalone/separate admonitions.  Two "Note:" following "Example:"
have been turned into ordinary paragraphs within the example.

NOTE: Because qapidoc.py does not attempt to preserve source ordering of
sections, the conversion of Notes from a "tagged section" to an
"untagged section" means that rendering order for some notes *may
change* as a result of this patch. The forthcoming qapidoc.py rewrite
strictly preserves source ordering in the rendered documentation, so
this issue will be rectified in the new generator.

Signed-off-by: John Snow <jsnow@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com> [for block*.json]
Message-ID: <20240626222128.406106-11-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message clarified slightly, period added to one more note]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-06 08:58:24 +02:00

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# -*- Mode: Python -*-
# vim: filetype=python
#
##
# = Character devices
##
{ 'include': 'sockets.json' }
##
# @ChardevInfo:
#
# Information about a character device.
#
# @label: the label of the character device
#
# @filename: the filename of the character device
#
# @frontend-open: shows whether the frontend device attached to this
# backend (e.g. with the chardev=... option) is in open or closed
# state (since 2.1)
#
# .. note:: @filename is encoded using the QEMU command line character
# device encoding. See the QEMU man page for details.
#
# Since: 0.14
##
{ 'struct': 'ChardevInfo',
'data': { 'label': 'str',
'filename': 'str',
'frontend-open': 'bool' } }
##
# @query-chardev:
#
# Returns information about current character devices.
#
# Returns: a list of @ChardevInfo
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "query-chardev" }
# <- {
# "return": [
# {
# "label": "charchannel0",
# "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server=on",
# "frontend-open": false
# },
# {
# "label": "charmonitor",
# "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server=on",
# "frontend-open": true
# },
# {
# "label": "charserial0",
# "filename": "pty:/dev/pts/2",
# "frontend-open": true
# }
# ]
# }
##
{ 'command': 'query-chardev', 'returns': ['ChardevInfo'],
'allow-preconfig': true }
##
# @ChardevBackendInfo:
#
# Information about a character device backend
#
# @name: The backend name
#
# Since: 2.0
##
{ 'struct': 'ChardevBackendInfo', 'data': {'name': 'str'} }
##
# @query-chardev-backends:
#
# Returns information about character device backends.
#
# Returns: a list of @ChardevBackendInfo
#
# Since: 2.0
#
# Example:
#
# -> { "execute": "query-chardev-backends" }
# <- {
# "return":[
# {
# "name":"udp"
# },
# {
# "name":"tcp"
# },
# {
# "name":"unix"
# },
# {
# "name":"spiceport"
# }
# ]
# }
##
{ 'command': 'query-chardev-backends', 'returns': ['ChardevBackendInfo'] }
##
# @DataFormat:
#
# An enumeration of data format.
#
# @utf8: Data is a UTF-8 string (RFC 3629)
#
# @base64: Data is Base64 encoded binary (RFC 3548)
#
# Since: 1.4
##
{ 'enum': 'DataFormat',
'data': [ 'utf8', 'base64' ] }
##
# @ringbuf-write:
#
# Write to a ring buffer character device.
#
# @device: the ring buffer character device name
#
# @data: data to write
#
# @format: data encoding (default 'utf8').
#
# - base64: data must be base64 encoded text. Its binary decoding
# gets written.
# - utf8: data's UTF-8 encoding is written
# - data itself is always Unicode regardless of format, like any
# other string.
#
# Since: 1.4
#
# Example:
#
# -> { "execute": "ringbuf-write",
# "arguments": { "device": "foo",
# "data": "abcdefgh",
# "format": "utf8" } }
# <- { "return": {} }
##
{ 'command': 'ringbuf-write',
'data': { 'device': 'str',
'data': 'str',
'*format': 'DataFormat'} }
##
# @ringbuf-read:
#
# Read from a ring buffer character device.
#
# @device: the ring buffer character device name
#
# @size: how many bytes to read at most
#
# @format: data encoding (default 'utf8').
#
# - base64: the data read is returned in base64 encoding.
# - utf8: the data read is interpreted as UTF-8.
# Bug: can screw up when the buffer contains invalid UTF-8
# sequences, NUL characters, after the ring buffer lost data,
# and when reading stops because the size limit is reached.
# - The return value is always Unicode regardless of format, like
# any other string.
#
# Returns: data read from the device
#
# Since: 1.4
#
# Example:
#
# -> { "execute": "ringbuf-read",
# "arguments": { "device": "foo",
# "size": 1000,
# "format": "utf8" } }
# <- { "return": "abcdefgh" }
##
{ 'command': 'ringbuf-read',
'data': {'device': 'str', 'size': 'int', '*format': 'DataFormat'},
'returns': 'str' }
##
# @ChardevCommon:
#
# Configuration shared across all chardev backends
#
# @logfile: The name of a logfile to save output
#
# @logappend: true to append instead of truncate (default to false to
# truncate)
#
# Since: 2.6
##
{ 'struct': 'ChardevCommon',
'data': { '*logfile': 'str',
'*logappend': 'bool' } }
##
# @ChardevFile:
#
# Configuration info for file chardevs.
#
# @in: The name of the input file
#
# @out: The name of the output file
#
# @append: Open the file in append mode (default false to truncate)
# (Since 2.6)
#
# Since: 1.4
##
{ 'struct': 'ChardevFile',
'data': { '*in': 'str',
'out': 'str',
'*append': 'bool' },
'base': 'ChardevCommon' }
##
# @ChardevHostdev:
#
# Configuration info for device and pipe chardevs.
#
# @device: The name of the special file for the device, i.e.
# /dev/ttyS0 on Unix or COM1: on Windows
#
# Since: 1.4
##
{ 'struct': 'ChardevHostdev',
'data': { 'device': 'str' },
'base': 'ChardevCommon' }
##
# @ChardevSocket:
#
# Configuration info for (stream) socket chardevs.
#
# @addr: socket address to listen on (server=true) or connect to
# (server=false)
#
# @tls-creds: the ID of the TLS credentials object (since 2.6)
#
# @tls-authz: the ID of the QAuthZ authorization object against which
# the client's x509 distinguished name will be validated. This
# object is only resolved at time of use, so can be deleted and
# recreated on the fly while the chardev server is active. If
# missing, it will default to denying access (since 4.0)
#
# @server: create server socket (default: true)
#
# @wait: wait for incoming connection on server sockets (default:
# false). Silently ignored with server: false. This use is
# deprecated.
#
# @nodelay: set TCP_NODELAY socket option (default: false)
#
# @telnet: enable telnet protocol on server sockets (default: false)
#
# @tn3270: enable tn3270 protocol on server sockets (default: false)
# (Since: 2.10)
#
# @websocket: enable websocket protocol on server sockets
# (default: false) (Since: 3.1)
#
# @reconnect: For a client socket, if a socket is disconnected, then
# attempt a reconnect after the given number of seconds. Setting
# this to zero disables this function. (default: 0) (Since: 2.2)
#
# Since: 1.4
##
{ 'struct': 'ChardevSocket',
'data': { 'addr': 'SocketAddressLegacy',
'*tls-creds': 'str',
'*tls-authz' : 'str',
'*server': 'bool',
'*wait': 'bool',
'*nodelay': 'bool',
'*telnet': 'bool',
'*tn3270': 'bool',
'*websocket': 'bool',
'*reconnect': 'int' },
'base': 'ChardevCommon' }
##
# @ChardevUdp:
#
# Configuration info for datagram socket chardevs.
#
# @remote: remote address
#
# @local: local address
#
# Since: 1.5
##
{ 'struct': 'ChardevUdp',
'data': { 'remote': 'SocketAddressLegacy',
'*local': 'SocketAddressLegacy' },
'base': 'ChardevCommon' }
##
# @ChardevMux:
#
# Configuration info for mux chardevs.
#
# @chardev: name of the base chardev.
#
# Since: 1.5
##
{ 'struct': 'ChardevMux',
'data': { 'chardev': 'str' },
'base': 'ChardevCommon' }
##
# @ChardevStdio:
#
# Configuration info for stdio chardevs.
#
# @signal: Allow signals (such as SIGINT triggered by ^C) be delivered
# to qemu. Default: true.
#
# Since: 1.5
##
{ 'struct': 'ChardevStdio',
'data': { '*signal': 'bool' },
'base': 'ChardevCommon' }
##
# @ChardevSpiceChannel:
#
# Configuration info for spice vm channel chardevs.
#
# @type: kind of channel (for example vdagent).
#
# Since: 1.5
##
{ 'struct': 'ChardevSpiceChannel',
'data': { 'type': 'str' },
'base': 'ChardevCommon',
'if': 'CONFIG_SPICE' }
##
# @ChardevSpicePort:
#
# Configuration info for spice port chardevs.
#
# @fqdn: name of the channel (see docs/spice-port-fqdn.txt)
#
# Since: 1.5
##
{ 'struct': 'ChardevSpicePort',
'data': { 'fqdn': 'str' },
'base': 'ChardevCommon',
'if': 'CONFIG_SPICE' }
##
# @ChardevDBus:
#
# Configuration info for DBus chardevs.
#
# @name: name of the channel (following docs/spice-port-fqdn.txt)
#
# Since: 7.0
##
{ 'struct': 'ChardevDBus',
'data': { 'name': 'str' },
'base': 'ChardevCommon',
'if': 'CONFIG_DBUS_DISPLAY' }
##
# @ChardevVC:
#
# Configuration info for virtual console chardevs.
#
# @width: console width, in pixels
#
# @height: console height, in pixels
#
# @cols: console width, in chars
#
# @rows: console height, in chars
#
# .. note:: The options are only effective when the VNC or SDL graphical
# display backend is active. They are ignored with the GTK, Spice,
# VNC and D-Bus display backends.
#
# Since: 1.5
##
{ 'struct': 'ChardevVC',
'data': { '*width': 'int',
'*height': 'int',
'*cols': 'int',
'*rows': 'int' },
'base': 'ChardevCommon' }
##
# @ChardevRingbuf:
#
# Configuration info for ring buffer chardevs.
#
# @size: ring buffer size, must be power of two, default is 65536
#
# Since: 1.5
##
{ 'struct': 'ChardevRingbuf',
'data': { '*size': 'int' },
'base': 'ChardevCommon' }
##
# @ChardevQemuVDAgent:
#
# Configuration info for qemu vdagent implementation.
#
# @mouse: enable/disable mouse, default is enabled.
#
# @clipboard: enable/disable clipboard, default is disabled.
#
# Since: 6.1
##
{ 'struct': 'ChardevQemuVDAgent',
'data': { '*mouse': 'bool',
'*clipboard': 'bool' },
'base': 'ChardevCommon',
'if': 'CONFIG_SPICE_PROTOCOL' }
##
# @ChardevBackendKind:
#
# @pipe: Since 1.5
#
# @udp: Since 1.5
#
# @mux: Since 1.5
#
# @msmouse: Since 1.5
#
# @wctablet: Since 2.9
#
# @braille: Since 1.5
#
# @testdev: Since 2.2
#
# @stdio: Since 1.5
#
# @console: Since 1.5
#
# @spicevmc: Since 1.5
#
# @spiceport: Since 1.5
#
# @qemu-vdagent: Since 6.1
#
# @dbus: Since 7.0
#
# @vc: v1.5
#
# @ringbuf: Since 1.6
#
# @memory: Since 1.5
#
# Features:
#
# @deprecated: Member @memory is deprecated. Use @ringbuf instead.
#
# Since: 1.4
##
{ 'enum': 'ChardevBackendKind',
'data': [ 'file',
{ 'name': 'serial', 'if': 'HAVE_CHARDEV_SERIAL' },
{ 'name': 'parallel', 'if': 'HAVE_CHARDEV_PARALLEL' },
'pipe',
'socket',
'udp',
'pty',
'null',
'mux',
'msmouse',
'wctablet',
{ 'name': 'braille', 'if': 'CONFIG_BRLAPI' },
'testdev',
'stdio',
{ 'name': 'console', 'if': 'CONFIG_WIN32' },
{ 'name': 'spicevmc', 'if': 'CONFIG_SPICE' },
{ 'name': 'spiceport', 'if': 'CONFIG_SPICE' },
{ 'name': 'qemu-vdagent', 'if': 'CONFIG_SPICE_PROTOCOL' },
{ 'name': 'dbus', 'if': 'CONFIG_DBUS_DISPLAY' },
'vc',
'ringbuf',
{ 'name': 'memory', 'features': [ 'deprecated' ] } ] }
##
# @ChardevFileWrapper:
#
# @data: Configuration info for file chardevs
#
# Since: 1.4
##
{ 'struct': 'ChardevFileWrapper',
'data': { 'data': 'ChardevFile' } }
##
# @ChardevHostdevWrapper:
#
# @data: Configuration info for device and pipe chardevs
#
# Since: 1.4
##
{ 'struct': 'ChardevHostdevWrapper',
'data': { 'data': 'ChardevHostdev' } }
##
# @ChardevSocketWrapper:
#
# @data: Configuration info for (stream) socket chardevs
#
# Since: 1.4
##
{ 'struct': 'ChardevSocketWrapper',
'data': { 'data': 'ChardevSocket' } }
##
# @ChardevUdpWrapper:
#
# @data: Configuration info for datagram socket chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevUdpWrapper',
'data': { 'data': 'ChardevUdp' } }
##
# @ChardevCommonWrapper:
#
# @data: Configuration shared across all chardev backends
#
# Since: 2.6
##
{ 'struct': 'ChardevCommonWrapper',
'data': { 'data': 'ChardevCommon' } }
##
# @ChardevMuxWrapper:
#
# @data: Configuration info for mux chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevMuxWrapper',
'data': { 'data': 'ChardevMux' } }
##
# @ChardevStdioWrapper:
#
# @data: Configuration info for stdio chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevStdioWrapper',
'data': { 'data': 'ChardevStdio' } }
##
# @ChardevSpiceChannelWrapper:
#
# @data: Configuration info for spice vm channel chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevSpiceChannelWrapper',
'data': { 'data': 'ChardevSpiceChannel' },
'if': 'CONFIG_SPICE' }
##
# @ChardevSpicePortWrapper:
#
# @data: Configuration info for spice port chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevSpicePortWrapper',
'data': { 'data': 'ChardevSpicePort' },
'if': 'CONFIG_SPICE' }
##
# @ChardevQemuVDAgentWrapper:
#
# @data: Configuration info for qemu vdagent implementation
#
# Since: 6.1
##
{ 'struct': 'ChardevQemuVDAgentWrapper',
'data': { 'data': 'ChardevQemuVDAgent' },
'if': 'CONFIG_SPICE_PROTOCOL' }
##
# @ChardevDBusWrapper:
#
# @data: Configuration info for DBus chardevs
#
# Since: 7.0
##
{ 'struct': 'ChardevDBusWrapper',
'data': { 'data': 'ChardevDBus' },
'if': 'CONFIG_DBUS_DISPLAY' }
##
# @ChardevVCWrapper:
#
# @data: Configuration info for virtual console chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevVCWrapper',
'data': { 'data': 'ChardevVC' } }
##
# @ChardevRingbufWrapper:
#
# @data: Configuration info for ring buffer chardevs
#
# Since: 1.5
##
{ 'struct': 'ChardevRingbufWrapper',
'data': { 'data': 'ChardevRingbuf' } }
##
# @ChardevBackend:
#
# Configuration info for the new chardev backend.
#
# @type: backend type
#
# Since: 1.4
##
{ 'union': 'ChardevBackend',
'base': { 'type': 'ChardevBackendKind' },
'discriminator': 'type',
'data': { 'file': 'ChardevFileWrapper',
'serial': { 'type': 'ChardevHostdevWrapper',
'if': 'HAVE_CHARDEV_SERIAL' },
'parallel': { 'type': 'ChardevHostdevWrapper',
'if': 'HAVE_CHARDEV_PARALLEL' },
'pipe': 'ChardevHostdevWrapper',
'socket': 'ChardevSocketWrapper',
'udp': 'ChardevUdpWrapper',
'pty': 'ChardevCommonWrapper',
'null': 'ChardevCommonWrapper',
'mux': 'ChardevMuxWrapper',
'msmouse': 'ChardevCommonWrapper',
'wctablet': 'ChardevCommonWrapper',
'braille': { 'type': 'ChardevCommonWrapper',
'if': 'CONFIG_BRLAPI' },
'testdev': 'ChardevCommonWrapper',
'stdio': 'ChardevStdioWrapper',
'console': { 'type': 'ChardevCommonWrapper',
'if': 'CONFIG_WIN32' },
'spicevmc': { 'type': 'ChardevSpiceChannelWrapper',
'if': 'CONFIG_SPICE' },
'spiceport': { 'type': 'ChardevSpicePortWrapper',
'if': 'CONFIG_SPICE' },
'qemu-vdagent': { 'type': 'ChardevQemuVDAgentWrapper',
'if': 'CONFIG_SPICE_PROTOCOL' },
'dbus': { 'type': 'ChardevDBusWrapper',
'if': 'CONFIG_DBUS_DISPLAY' },
'vc': 'ChardevVCWrapper',
'ringbuf': 'ChardevRingbufWrapper',
'memory': 'ChardevRingbufWrapper' } }
##
# @ChardevReturn:
#
# Return info about the chardev backend just created.
#
# @pty: name of the slave pseudoterminal device, present if and only
# if a chardev of type 'pty' was created
#
# Since: 1.4
##
{ 'struct' : 'ChardevReturn',
'data': { '*pty': 'str' } }
##
# @chardev-add:
#
# Add a character device backend
#
# @id: the chardev's ID, must be unique
#
# @backend: backend type and parameters
#
# Returns: ChardevReturn.
#
# Since: 1.4
#
# Examples:
#
# -> { "execute" : "chardev-add",
# "arguments" : { "id" : "foo",
# "backend" : { "type" : "null", "data" : {} } } }
# <- { "return": {} }
#
# -> { "execute" : "chardev-add",
# "arguments" : { "id" : "bar",
# "backend" : { "type" : "file",
# "data" : { "out" : "/tmp/bar.log" } } } }
# <- { "return": {} }
#
# -> { "execute" : "chardev-add",
# "arguments" : { "id" : "baz",
# "backend" : { "type" : "pty", "data" : {} } } }
# <- { "return": { "pty" : "/dev/pty/42" } }
##
{ 'command': 'chardev-add',
'data': { 'id': 'str',
'backend': 'ChardevBackend' },
'returns': 'ChardevReturn' }
##
# @chardev-change:
#
# Change a character device backend
#
# @id: the chardev's ID, must exist
#
# @backend: new backend type and parameters
#
# Returns: ChardevReturn.
#
# Since: 2.10
#
# Examples:
#
# -> { "execute" : "chardev-change",
# "arguments" : { "id" : "baz",
# "backend" : { "type" : "pty", "data" : {} } } }
# <- { "return": { "pty" : "/dev/pty/42" } }
#
# -> {"execute" : "chardev-change",
# "arguments" : {
# "id" : "charchannel2",
# "backend" : {
# "type" : "socket",
# "data" : {
# "addr" : {
# "type" : "unix" ,
# "data" : {
# "path" : "/tmp/charchannel2.socket"
# }
# },
# "server" : true,
# "wait" : false }}}}
# <- {"return": {}}
##
{ 'command': 'chardev-change',
'data': { 'id': 'str',
'backend': 'ChardevBackend' },
'returns': 'ChardevReturn' }
##
# @chardev-remove:
#
# Remove a character device backend
#
# @id: the chardev's ID, must exist and not be in use
#
# Since: 1.4
#
# Example:
#
# -> { "execute": "chardev-remove", "arguments": { "id" : "foo" } }
# <- { "return": {} }
##
{ 'command': 'chardev-remove',
'data': { 'id': 'str' } }
##
# @chardev-send-break:
#
# Send a break to a character device
#
# @id: the chardev's ID, must exist
#
# Since: 2.10
#
# Example:
#
# -> { "execute": "chardev-send-break", "arguments": { "id" : "foo" } }
# <- { "return": {} }
##
{ 'command': 'chardev-send-break',
'data': { 'id': 'str' } }
##
# @VSERPORT_CHANGE:
#
# Emitted when the guest opens or closes a virtio-serial port.
#
# @id: device identifier of the virtio-serial port
#
# @open: true if the guest has opened the virtio-serial port
#
# .. note:: This event is rate-limited.
#
# Since: 2.1
#
# Example:
#
# <- { "event": "VSERPORT_CHANGE",
# "data": { "id": "channel0", "open": true },
# "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
##
{ 'event': 'VSERPORT_CHANGE',
'data': { 'id': 'str',
'open': 'bool' } }
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